Phytotoxic effects of silver nanoparticles and silver ions to Arabidopsis thaliana as revealed by analysis of molecular responses and of metabolic pathways

Microorganisms like fungi, actinomycetes and bacteria are considered nanofactories and are helpful in the production of nanoparticles useful in the welfare of human beings. In the present study, we investigated the production of silver nanoparticles from Streptomyces species JF714876. Extracellular synthesis of silver nanoparticles by Streptomyces species was carried out using two different media. Silver nanoparticles were examined using UV-visible, IR and atomic force microscopy. The size of silver nanoparticles was in the range of 80-100 nm. Antimicrobial activity of silver nanoparticle against bacteria such as E. coli, S. aureus, and dermatophytes like T. rubrum and T. tonsurans was determined. Thus, this study suggests that the Streptomyces sp. JF741876 can produce silver ions that can be used as an antimicrobial substance.

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Testing of photocatalytic potential of silver nanoparticles produced through nonthermal plasma reduction reaction and stabilized with saccharides

Main Group Chemistry ◽

10.3233/mgc-210059 ◽

2021 ◽

pp. 1-14

Author(s):

N.U.H. Altaf ◽

M.Y. Naz ◽

S. Shukrullah ◽

H.N. Bhatti

Keyword(s):

Silver Nanoparticles ◽

Band Gap ◽

Light Exposure ◽

Argon Plasma ◽

Silver Ions ◽

Reduction Reaction ◽

Diameter Distribution ◽

Light Spectrum ◽

Plasma Reduction ◽

Narrow Diameter Distribution

In this study, silver nanoparticles (AgNPs) were produced through an atmospheric pressure plasma reduction reaction and tested for photodegradation of methyl blue (MB) under sunlight exposure. The argon plasma born reactive species were used to reduce silver ions to AgNPs in the solution. Glucose, fructose and sucrose were also added in the solution to stabilize the growth process. The glucose stabilized reaction produced the smallest nanoparticles of 12 nm, while sucrose stabilized reaction produced relatively larger nanoparticles (14 nm). The nanoparticles exhibited rough morphology and narrow diameter distribution regardless of stabilizer type. The narrow diameter distribution and small band gap helped activating majority of nanoparticles at a single wavelength of light spectrum. The band gap energy of AgNPs varied from 2.22 eV to 2.41 eV, depending on the saccharide type. The photoluminescence spectroscopy of AgNPs produced emission peaks at 413 nm, 415 nm, and 418 nm. The photocatalytic potential of AgNP samples was checked by degrading MB dye under sunlight. The degradation reaction reached a saturation level of 98% after 60 min of light exposure.

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The antimicrobial activity of silver nanoparticles biocomposite films depends on the silver ions release behaviour

Food Chemistry ◽

10.1016/j.foodchem.2021.129859 ◽

2021 ◽

Vol 359 ◽

pp. 129859

Author(s):

Li Wang ◽

Govindasami Periyasami ◽

Ali Aldalbahi ◽

Vincenzo Fogliano

Keyword(s):

Antimicrobial Activity ◽

Silver Nanoparticles ◽

Silver Ions ◽

Biocomposite Films

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Nanozyme catalysis-powered portable mini-drainage device enables real-time and universal weighing analysis of silver ions and silver nanoparticles

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2021.125689 ◽

2021 ◽

pp. 125689

Author(s):

Xiaoming Ma ◽

Zhen Wang ◽

Xuan Hu ◽

Jinghua Chen ◽

Huifang Zhang ◽

...

Keyword(s):

Silver Nanoparticles ◽

Real Time ◽

Silver Ions ◽

Drainage Device

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Toxicity of silver ions and differently coated silver nanoparticles in Allium cepa roots

Ecotoxicology and Environmental Safety ◽

10.1016/j.ecoenv.2016.11.009 ◽

2017 ◽

Vol 137 ◽

pp. 18-28 ◽

Cited By ~ 90

Author(s):

Petra Cvjetko ◽

Anita Milošić ◽

Ana-Marija Domijan ◽

Ivana Vinković Vrček ◽

Sonja Tolić ◽

...

Keyword(s):

Silver Nanoparticles ◽

Allium Cepa ◽

Silver Ions

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The impacts of silver nanoparticles and silver ions on wastewater biological phosphorous removal and the mechanisms

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2012.07.049 ◽

2012 ◽

Vol 239-240 ◽

pp. 88-94 ◽

Cited By ~ 58

Author(s):

Yinguang Chen ◽

Hong Chen ◽

Xiong Zheng ◽

Hui Mu

Keyword(s):

Silver Nanoparticles ◽

Silver Ions ◽

Phosphorous Removal

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A Novel Photosynthesis of Carboxymethyl Starch-Stabilized Silver Nanoparticles

The Scientific World JOURNAL ◽

10.1155/2014/514563 ◽

2014 ◽

Vol 2014 ◽

pp. 1-11 ◽

Cited By ~ 8

Author(s):

M. A. El-Sheikh

Keyword(s):

Silver Nanoparticles ◽

Room Temperature ◽

Colloidal Solution ◽

Synthesis Method ◽

Silver Ions ◽

Water Soluble ◽

Synthesis Process ◽

Carboxymethyl Starch ◽

Round Shape ◽

First Time

The water soluble photoinitiator (PI) 4-(trimethyl ammonium methyl) benzophenone chloride is used for the first time in the synthesis of silver nanoparticles (AgNPs). A new green synthesis method involves using PI/UV system, carboxymethyl starch (CMS), silver nitrate, and water. A mechanism of the reduction of silver ions to AgNPs by PI/UV system as well as by the newly born aldehydic groups was proposed. The synthesis process was assessed by UV-vis spectra and TEM of AgNPs colloidal solution. The highest absorbance was obtained using CMS, PI and AgNO3concentrations of 10 g/L, 1 g/L, and 1 g/L, respectively; 40°C; 60 min; pH 7; and a material : liquor ratio 1 : 20. AgNPs so-obtained were stable in aqueous solution over a period of three weeks at room temperature (~25°C) and have round shape morphology. The sizes of synthesized AgNPs were in the range of 1–21 nm and the highest counts % of these particles were for particles of 6–10 and 1–3 nm, respectively.

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